diff --git a/ci/requirements.txt b/ci/requirements.txt
index cabd1dd..0130c4d 100644
--- a/ci/requirements.txt
+++ b/ci/requirements.txt
@@ -1,5 +1,5 @@
 #python>=3.7
-matplotlib==3.9.3
+matplotlib==3.9.4
 numpy==2.2.0
 pandas==2.2.3
 pyyaml==6.0.2